generated: '2026-08-12'
method: searched
source: https://products.zetaglobal.com/sailthru/Content/developers/api-basics/technical.html
docs: https://products.zetaglobal.com/sailthru/Content/developers/api-basics/technical.html
api: sailthru:sailthru-api
limit_count: 5
scope: per-api-key, per-endpoint, per-method
window: 1 second
note: >-
  Sailthru publishes per-endpoint, per-method request ceilings and returns
  runtime rate-limit headers on every call, which is the signal an agent
  actually needs. Exceeding a ceiling returns HTTP 429 with API error code 43
  ("Too many [type] requests this minute to /[endpoint] API"). Note the docs
  describe the ceilings in requests per second while error 43's own text and
  the 429 description are phrased per minute; the ceilings below are recorded
  exactly as the technical-details page states them.
limits:
- endpoint: /send
  method: POST
  limit: 200
  window: 1s
- endpoint: /user
  method: POST
  limit: 300
  window: 1s
- endpoint: all others
  method: POST
  limit: 40
  window: 1s
- endpoint: all
  method: GET
  limit: 300
  window: 1s
- endpoint: all
  method: DELETE
  limit: 40
  window: 1s
headers:
  limit: X-Rate-Limit-Limit
  remaining: X-Rate-Limit-Remaining
  reset: X-Rate-Limit-Reset
  retry_after: null
exhaustion:
  http_status: 429
  api_error_code: 43
  api_error_message: Too many [type] requests this minute to /[endpoint] API
  envelope_fields: [error, errormsg]
concurrency: null